The higher the period of the atom bonded to hydrogen the lower the acidity of the molecule.
True. When comparing a column, electronegativity is no longer the controlling factor. Acidity increases from top to bottom in a column of the periodic table, whereas electronegativity increases. Atoms lower in the column form weaker H bonds because their large atomic orbitals do not overlap as well with the small hydrogen 1s orbital. Weaker bonds make removing the proton easier. The ability of larger anions to better accomodate a negative charge also contributes to this trend.